Farm Forestry New ZealandAssessment of NZDFI’s 2016 Eucalyptus quadrangulata breeding population at NZRC Paparoa
By Monika Sharma, Clemens Altaner, January 2023.
Download SWP-T156 (pdf)
Executive summary
This report concerns the phenotyping of NZDFI’s E. quadrangulata 2016 breeding population at NZRC Paparoa for heartwood and predicted extractive content.
Heartwood diameter was not genetically correlated to tree DBH but negatively to sapwood diameter. This would suggest that DBH cannot be used as proxy to select for heartwood quantity.
Genetic control of heartwood quantity (heartwood diameter) and quality (i.e. predicted extractive content) was inconclusive. The weak colour discrepancies of methyl orange treated cores on the dry state and low heartwood extractive content contributed to the larger uncertainty in these values.
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